什么是标准齿轮

? is more important,Ithink, is that listening to your children can make them opentheir hearts to youA itB whichC whatD as simply mean that the loss of them made me more appreciate what Ihad 最完美的翻译! Sometimes,when you pretend that you don’t care,it will make you miss them more 初三英语英语关于第十单元的题1.They will () ()（出发） on a journey around the world.2.You are too fat and you must () () () ()(不能吃那么多）.3.Frank ()(意识到他的错误）and said sorry to Mario.4.A few years ago,it was 求大学新视野大学英语读写课程第二册的习题答案与第二册英语听力答案要新视野的,要TXT的 平面直角坐标系中,点A（-2,1）B(6,5),(1)在x轴上求一点P,使得PA+PB最小； （2）求PA+PB的最小值 第十题, 一又九分之七化成分数是多少 计算sin^210+sin50+sin10sin50的值,要步骤 sin2120°+cos180°+tan45°-cos2(-330°)+sin(-210°) 最好快点、、sin2120°+cos180°+tan45°-cos2(-330°)+sin(-210°) 根据首字母提示,完成下短文The farm is near our village.It's not big.My parents plant two kinds of fruit tree apple trees and peach trees,and we have a________ zoo fruit trees t________. 如图,平面直角坐标系中,点A为(0,2),点B为(6,6),点P是x轴上一动点,当PA+PB的值最小时,求：1、点P的坐标 2、PA+PB的最小值我现在知道PA+PB最小值为10,但是我不知道怎么求P点坐标,还没学到相似三角 平面直角坐标系中,点a的坐标是(-4,4),点b的坐标是(2,5),在x轴上有一动点p,要使pa+pb的距离最短,则点p的坐标是------ 如果sin(α-π/6)=1/3,那么sin(2α+π/6)的值是 根据文章内容及首字母提示完成短文You are never too young to start doing things.Mei Lanfang first p Beijing Opera when he was ten.He was a g Beijing Opera performer in China.He was born in Beijing on October 22,1894.His f was very poor. 根据短文内容和首字母提示完成短文All the family m______try to be back home for the dinner.While they enjoy the dinner,they talk about the past year and the c______new year. (1)在平面直角坐标系中描出点A（0,4）和点（5,2）：(2)在x轴上确定一点p,使pA+pB最小：(3)求p点坐标 在平面直角坐标系中A（2,-1）,B(-3,1),点P在y轴上,且PA=PB,求点P得坐标 根据短文内容及首字母提示完成单词People in many countries are leraning English .Some leran at school,and others by t_1__.A f___2__leran over radio.Why do all people want to leran English?It is difficult to g_3___ an answer.But boys and 1/sinα的周期? sin 75结果证明过程就是求值 对数函数解题求函数y=√loga（-x²-x）的定义域和值域.答案中定义域为{x|-1 用《清平乐•村居》改成一篇小短文（不超过五十字或五十字左右） 求此对数函数的解答函数 f(x)=log2(ax^2+3x+a)的定义域是任意实数,求a的取值范围 对数函数求解答lg5²+2/3lg8+lg5Xlg20+(lg2)²求详细过程 如图,在平面直角坐标系中,点A(2,6),B(-1,-1),点P在y轴上运动,则PA-PB的绝对值的最大值为? 实数a 、b,a>0,b 求解对数函数题log2（log2 16）求得数 logx (x^2 - 2) = 1 求Xloga (x^2 - x -5) = 0求X不知分给谁好了! 帮忙解一个对数函数题已知正实数x,y,z满足 3^x=4^y=6^z,求证：1/z-1/x=1/2y 他做菜很好吃 英语翻译1 他做菜很好吃 / 很难吃 2 那个女孩很会做菜,你可以跟她学习下.3 我好久没吃过你做的饭菜了,还是那么好吃啊4 你可以尝尝她做的饭菜 ,非常好吃.味道也不错英 英语翻译：我喜欢红色,喜欢梨.因为红色很好看,梨很好吃.